Battle of Sampford Courtenay: The Prayer Book Rebellion is quashed in England.

The Battle of Sampford Courtenay was one of the chief military engagements in the Western Rebellion of 1549.

The Prayer Book Rebellion or Western Rising was a popular revolt in Cornwall and Devon in 1549. In that year, the first Book of Common Prayer, presenting the theology of the English Reformation, was introduced. The change was widely unpopular, particularly in areas where firm Catholic religious loyalty still existed, such as Lancashire. Along with poor economic conditions, the enforcement of English language church services only in Cornish-speaking areas led to an explosion of anger in Cornwall and Devon, initiating an uprising. At the gates of Exeter, the rising leaders announced, "and so we Cornishmen, whereof certain of us understand no English, utterly refuse this new English". In response, Edward Seymour, 1st Duke of Somerset, sent John Russell to suppress the revolt, with the rebels being defeated and its leaders executed two months after the beginning of hostilities. Up to 5,500 men were killed, mainly Cornish and Devon Catholics.

The Kingdom of England was a sovereign state on the island of Great Britain from the 10th century, when it was unified from various Anglo-Saxon kingdoms, until 1 May 1707, when it united with Scotland to form the Kingdom of Great Britain, which would later become the United Kingdom. The Kingdom of England was among the most powerful states in Europe during the medieval and early modern periods.